In this paper, we present a newly designed flexible optical fiber force sensors which use
fiber Bragg gratings and diaphragm and bridge type transducer, to detect a distributed normal force
and which is the first step toward realizing a tactile sensor using optical fiber sensors (FBG). The
transducer is designed such that it is not affected by chirping and light loss to enhance the
performance of the sensors. We also present the design and fabrication process and experimental
verification of the prototype sensors.